Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized for You

we will pick new questions that match your level based on your Timer History

Track Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 500,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

100% (01:42) correct
0% (00:00) wrong based on 3 sessions

HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Hi everyone. Can anyone help me to solve these questions, please? Sorry, I don't know how to upload questions so everyone can see them. Thanks in advance!

Try uploading them as jpegs instead of docs.....that way members will be able to view the question in their explorer windows itself....
_________________

Hi everyone. Can anyone help me to solve these questions, please? Sorry, I don't know how to upload questions so everyone can see them. Thanks in advance!

Q 1 .See the attached figure.

Let the sides of the triangle be a, b and c Clearly using simple trigo calculations we can see that a=b= 5 and c= 5\sqrt{2} Now lets draw perpendicular on C with the height h. This perpendicular will bisect the side C, So let X= 1/2 x C = 1/2 x 5\sqrt{2}

Hi everyone. Can anyone help me to solve these questions, please? Sorry, I don't know how to upload questions so everyone can see them. Thanks in advance!

Q 2 See the attached figure.

Distance traveled = D = 2 pi R = 2pi = 2 x 3.14

where r = radius of the lake = 1 mile

Distance = speed x time Speed = 3 miles per hour time = Distance / speed =(2 x 3.14) / 3

Hi everyone. Can anyone help me to solve these questions, please? Sorry, I don't know how to upload questions so everyone can see them. Thanks in advance!

Method 1: There is a coordinate geometry formula that uses matrices to give you the area of a triangle whose coordinates are known. The final formula is: If the coordinates of a triangle are A(x1,y1), B(x2,y2) & C(x3,y3), then the area of the triangle is given by, 1/2* [(x1-x2)(y2-y3) - (y1-y2)(x2-x3)]

Applying we get, A(PQR) = 1/2* [(4-0)(3-4) - (0-3)(0-7)] = 1/2 [(-4) - (21)] = 1/2 [-25] .......... ignore the '-' sign = 12.5 ANS: A

Note: This method is also useful to decide whether the given 3 points form a triangle or they are collinear. If the area turns out to be zero, then the points are collinear.

Method 2: Drop perpendiculars from point R to the X and Y axes at points S(7,0) and T(0,4) respectively. Thus OSRT is a rectangle.

Now A(PQR) = A(OSRT) - A(OQP) - A(QRT) - A(PRS) where all the three triangles are right triangles. A(PQR) = 7*4 - (3*4/2) - (7*1/2) - (3*4/2) = 12.5 ANS: A

Method 3: Find out the lengths of the three sides using distance formula and then use the formula that calculates the area of a triangle from its sides.
_________________

Hi everyone. Can anyone help me to solve these questions, please? Sorry, I don't know how to upload questions so everyone can see them. Thanks in advance!

The way u can represent the scores = 48, 48 , 70, 70, 70 , 80 , 80, 80, 80, 84 , 84 , 84, 84, 84, 84 , 84, 96, 96, 96,96

So clearly the Median = 84

See the figure for this question .

I don't know how to work on the 5th question may be some body can shed some light on this one.

Its given that the student worked for 20 days and earned: 48$ - on 2 days 70$ - on 3 days 80$ - on 4 days 84$ - on 7 days 96$ - on 4 days

For Median of even no of amounts, we need to arrange the amounts in ascending order and take the avg of the amounts placed in 10th and 11th positions => (84 + 84)/2 = 84

Method 1: There is a coordinate geometry formula that uses matrices to give you the area of a triangle whose coordinates are known. The final formula is: If the coordinates of a triangle are A(x1,y1), B(x2,y2) & C(x3,y3), then the area of the triangle is given by, 1/2* [(x1-x2)(y2-y3) - (y1-y2)(x2-x3)]

Applying we get, A(PQR) = 1/2* [(4-0)(3-4) - (0-3)(0-7)] = 1/2 [(-4) - (21)] = 1/2 [-25] .......... ignore the '-' sign = 12.5 ANS: A

Note: This method is also useful to decide whether the given 3 points form a triangle or they are collinear. If the area turns out to be zero, then the points are collinear.

Method 2: Drop perpendiculars from point R to the X and Y axes at points S(7,0) and T(0,4) respectively. Thus OSRT is a rectangle.

Now A(PQR) = A(OSRT) - A(OQP) - A(QRT) - A(PRS) where all the three triangles are right triangles. A(PQR) = 7*4 - (3*4/2) - (7*1/2) - (3*4/2) = 12.5 ANS: A

Method 3: Find out the lengths of the three sides using distance formula and then use the formula that calculates the area of a triangle from its sides.

Hey Sameer,

I was actually wondering if there is a faster way of solving this one and u just came up with that ..

Now we need to calculate the acceptable range for the observations measuring 1.5 SDs on either side of the mean => 8.1 + (0.3)*1.5 => 8.1 + 0.45 => 7.65 to 8.55

Except for 7.51 all the entries are within 1.5 SDs of the mean.

Hi everyone. Can anyone help me to solve these questions, please? Sorry, I don't know how to upload questions so everyone can see them. Thanks in advance!